in gdbclient/graph/detachedgraph.go [168:179]
func (d *DetachedVertex) VProperty(key string) VertexProperty {
if d.properties == nil {
return nil
}
if v, ok := d.properties[key]; ok {
if vp, ok := v[0].(VertexProperty); ok {
return vp
}
}
return nil
}